The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/mips/mips/gdb_machdep.c

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    1 /*      $NetBSD: kgdb_machdep.c,v 1.11 2005/12/24 22:45:35 perry Exp $  */
    2 
    3 /*-
    4  * Copyright (c) 2004 Marcel Moolenaar
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  *
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  */
   28 /*-
   29  * Copyright (c) 1997 The NetBSD Foundation, Inc.
   30  * All rights reserved.
   31  *
   32  * This code is derived from software contributed to The NetBSD Foundation
   33  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
   34  * NASA Ames Research Center.
   35  *
   36  * Redistribution and use in source and binary forms, with or without
   37  * modification, are permitted provided that the following conditions
   38  * are met:
   39  * 1. Redistributions of source code must retain the above copyright
   40  *    notice, this list of conditions and the following disclaimer.
   41  * 2. Redistributions in binary form must reproduce the above copyright
   42  *    notice, this list of conditions and the following disclaimer in the
   43  *    documentation and/or other materials provided with the distribution.
   44  *
   45  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   46  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   47  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   48  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   49  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   50  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   51  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   52  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   53  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   54  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   55  * POSSIBILITY OF SUCH DAMAGE.
   56  */
   57 
   58 /*
   59  * Copyright (c) 1996 Matthias Pfaller.
   60  * All rights reserved.
   61  *
   62  * Redistribution and use in source and binary forms, with or without
   63  * modification, are permitted provided that the following conditions
   64  * are met:
   65  * 1. Redistributions of source code must retain the above copyright
   66  *    notice, this list of conditions and the following disclaimer.
   67  * 2. Redistributions in binary form must reproduce the above copyright
   68  *    notice, this list of conditions and the following disclaimer in the
   69  *    documentation and/or other materials provided with the distribution.
   70  * 3. All advertising materials mentioning features or use of this software
   71  *    must display the following acknowledgement:
   72  *      This product includes software developed by Matthias Pfaller.
   73  * 4. The name of the author may not be used to endorse or promote products
   74  *    derived from this software without specific prior written permission
   75  *
   76  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   77  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   78  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   79  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   80  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   81  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   82  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   83  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   84  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   85  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   86  *
   87  *      JNPR: gdb_machdep.c,v 1.1 2007/08/09 12:25:25 katta
   88  * $FreeBSD: releng/10.1/sys/mips/mips/gdb_machdep.c 263687 2014-03-24 13:48:04Z emaste $
   89  */
   90 
   91 #include <sys/cdefs.h>
   92 
   93 #include <sys/param.h>
   94 #include <sys/systm.h>
   95 #include <sys/kdb.h>
   96 #include <sys/kernel.h>
   97 #include <sys/signal.h>
   98 #include <sys/pcpu.h>
   99 
  100 #include <machine/gdb_machdep.h>
  101 #include <machine/pcb.h>
  102 #include <machine/reg.h>
  103 #include <machine/trap.h>
  104 
  105 #include <gdb/gdb.h>
  106 
  107 void *
  108 gdb_cpu_getreg(int regnum, size_t *regsz)
  109 {
  110 
  111         *regsz = gdb_cpu_regsz(regnum);
  112         if (kdb_thread == curthread) {
  113                 register_t *zero_ptr = &kdb_frame->zero;
  114                 return zero_ptr + regnum;
  115         }
  116         
  117         switch (regnum) {
  118         /* 
  119          * S0..S7
  120          */
  121         case 16:
  122         case 17:
  123         case 18:
  124         case 19:
  125         case 20:
  126         case 21:
  127         case 22:
  128         case 23:
  129                 return (&kdb_thrctx->pcb_context[PCB_REG_S0 + regnum - 16]);
  130         case 28: 
  131                 return (&kdb_thrctx->pcb_context[PCB_REG_GP]);
  132         case 29: 
  133                 return (&kdb_thrctx->pcb_context[PCB_REG_SP]);
  134         case 30: 
  135                 return (&kdb_thrctx->pcb_context[PCB_REG_S8]);
  136         case 31: 
  137                 return (&kdb_thrctx->pcb_context[PCB_REG_RA]);
  138         case 37: 
  139                 return (&kdb_thrctx->pcb_context[PCB_REG_PC]);
  140         }
  141         return (NULL);
  142 }
  143 
  144 void
  145 gdb_cpu_setreg(int regnum, void *val)
  146 {
  147         switch (regnum) {
  148         case GDB_REG_PC:
  149                 kdb_thrctx->pcb_context[10] = *(register_t *)val;
  150                 if (kdb_thread == curthread)
  151                         kdb_frame->pc = *(register_t *)val;
  152         }
  153 }
  154 
  155 int
  156 gdb_cpu_signal(int entry, int code)
  157 {
  158         switch (entry) {
  159         case T_TLB_MOD:
  160         case T_TLB_MOD+T_USER:
  161         case T_TLB_LD_MISS:
  162         case T_TLB_ST_MISS:
  163         case T_TLB_LD_MISS+T_USER:
  164         case T_TLB_ST_MISS+T_USER:
  165         case T_ADDR_ERR_LD:             /* misaligned access */
  166         case T_ADDR_ERR_ST:             /* misaligned access */
  167         case T_BUS_ERR_LD_ST:           /* BERR asserted to CPU */
  168         case T_ADDR_ERR_LD+T_USER:      /* misaligned or kseg access */
  169         case T_ADDR_ERR_ST+T_USER:      /* misaligned or kseg access */
  170         case T_BUS_ERR_IFETCH+T_USER:   /* BERR asserted to CPU */
  171         case T_BUS_ERR_LD_ST+T_USER:    /* BERR asserted to CPU */
  172                 return (SIGSEGV);
  173 
  174         case T_BREAK:
  175         case T_BREAK+T_USER:
  176                 return (SIGTRAP);
  177 
  178         case T_RES_INST+T_USER:
  179         case T_COP_UNUSABLE+T_USER:
  180                 return (SIGILL);
  181 
  182         case T_FPE+T_USER:
  183         case T_OVFLOW+T_USER:
  184                 return (SIGFPE);
  185 
  186         default:
  187                 return (SIGEMT);
  188         }
  189 }

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